content: /* Copyright (C) 2016-2018 Alibaba Group Holding Limited
  
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
  
      http://www.apache.org/licenses/LICENSE-2.0
  
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
  ==============================================================================*/
  
  // See README.txt for information and build instructions.
  
  import com.example.tutorial.AddressBookProtos.AddressBook;
  import com.example.tutorial.AddressBookProtos.Person;
  import java.io.BufferedReader;
  import java.io.FileInputStream;
  import java.io.FileNotFoundException;
  import java.io.FileOutputStream;
  import java.io.InputStreamReader;
  import java.io.IOException;
  import java.io.PrintStream;
  
  class AddPerson {
    // This function fills in a Person message based on user input.
    static Person PromptForAddress(BufferedReader stdin,
                                   PrintStream stdout) throws IOException {
      Person.Builder person = Person.newBuilder();
  
      stdout.print("Enter person ID: ");
      person.setId(Integer.valueOf(stdin.readLine()));
  
      stdout.print("Enter name: ");
      person.setName(stdin.readLine());
  
      stdout.print("Enter email address (blank for none): ");
      String email = stdin.readLine();
      if (email.length() > 0) {
        person.setEmail(email);
      }
  
      while (true) {
        stdout.print("Enter a phone number (or leave blank to finish): ");
        String number = stdin.readLine();
        if (number.length() == 0) {
          break;
        }
  
        Person.PhoneNumber.Builder phoneNumber =
          Person.PhoneNumber.newBuilder().setNumber(number);
  
        stdout.print("Is this a mobile, home, or work phone? ");
        String type = stdin.readLine();
        if (type.equals("mobile")) {
          phoneNumber.setType(Person.PhoneType.MOBILE);
        } else if (type.equals("home")) {
          phoneNumber.setType(Person.PhoneType.HOME);
        } else if (type.equals("work")) {
          phoneNumber.setType(Person.PhoneType.WORK);
        } else {
          stdout.println("Unknown phone type.  Using default.");
        }
  
        person.addPhones(phoneNumber);
      }
  
      return person.build();
    }
  
    // Main function:  Reads the entire address book from a file,
    //   adds one person based on user input, then writes it back out to the same
    //   file.
    public static void main(String[] args) throws Exception {
      if (args.length != 1) {
        System.err.println("Usage:  AddPerson ADDRESS_BOOK_FILE");
        System.exit(-1);
      }
  
      AddressBook.Builder addressBook = AddressBook.newBuilder();
  
      // Read the existing address book.
      try {
        FileInputStream input = new FileInputStream(args[0]);
        try {
          addressBook.mergeFrom(input);
        } finally {
          try { input.close(); } catch (Throwable ignore) {}
        }
      } catch (FileNotFoundException e) {
        System.out.println(args[0] + ": File not found.  Creating a new file.");
      }
  
      // Add an address.
      addressBook.addPeople(
        PromptForAddress(new BufferedReader(new InputStreamReader(System.in)),
                         System.out));
  
      // Write the new address book back to disk.
      FileOutputStream output = new FileOutputStream(args[0]);
      try {
        addressBook.build().writeTo(output);
      } finally {
        output.close();
      }
    }
  }
  